package util;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.activation.MimetypesFileTypeMap;
/**
 * java通过模拟post方式提交表单实现图片上传功能实例
 */
public class HttpUploadFile {

    public static void main(String[] args) {
        testUploadImage();
    }

    /**
     * 上传文件图片
     */
    public static void testUploadImage(){
        String url = "https://api.megvii.com/faceid/v2/verify";
        String path = "/Users/jianghaozhang/Desktop/photo/image_env.jpg";
        Map<String, String> textMap = new HashMap<String, String>();
        Map<String, String> fileMap = new HashMap<String, String>();
        textMap.put("api_key", "key");
        textMap.put("api_secret", "serect");
        textMap.put("comparison_type", "1");
        textMap.put("face_image_type", "raw_image");
        textMap.put("idcard_name", "姓名");
        textMap.put("idcard_number", "身份证号");
        fileMap.put("image", path);
        String contentType = "application/octet-stream";
        String ret = formUpload(url, textMap, fileMap,contentType);
        System.out.println(ret);
    }

    /**
     * 上传图片
     */
    @SuppressWarnings("rawtypes")
    public static String formUpload(String urlStr, Map<String, String> textMap,
                                    Map<String, String> fileMap,String contentType) {
        String res = "";
        HttpURLConnection conn = null;
        String BOUNDARY = "---------------------------123821742118716";
        try {
            URL url = new URL(urlStr);
            conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(30000);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("User-Agent",
                    "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
            conn.setRequestProperty("Content-Type",
                    "multipart/form-data; boundary=" + BOUNDARY);
            conn.setRequestProperty("Charset", "UTF-8");
            OutputStream out = new DataOutputStream(conn.getOutputStream());
            if (textMap != null) {
                StringBuffer strBuf = new StringBuffer();
                Iterator iter = textMap.entrySet().iterator();
                while (iter.hasNext()) {
                    Map.Entry entry = (Map.Entry) iter.next();
                    String inputName = (String) entry.getKey();
                    String inputValue = (String) entry.getValue();
                    if (inputValue == null) {
                        continue;
                    }
                    strBuf.append("\r\n").append("--").append(BOUNDARY)
                            .append("\r\n");
                    strBuf.append("Content-Disposition: form-data; name=\""
                            + inputName + "\"\r\n\r\n");
                    strBuf.append(inputValue);
                }
                out.write(strBuf.toString().getBytes());
            }
            if (fileMap != null) {
                Iterator iter = fileMap.entrySet().iterator();
                while (iter.hasNext()) {
                    Map.Entry entry = (Map.Entry) iter.next();
                    String inputName = (String) entry.getKey();
                    String inputValue = (String) entry.getValue();
                    if (inputValue == null) {
                        continue;
                    }
                    File file = new File(inputValue);
                    String filename = file.getName();
                    StringBuffer strBuf = new StringBuffer();
                    strBuf.append("\r\n").append("--").append(BOUNDARY)
                            .append("\r\n");
                    strBuf.append("Content-Disposition: form-data; name=\""
                            + inputName + "\"; filename=\"" + filename
                            + "\"\r\n");
                    strBuf.append("Content-Type:" + contentType + "\r\n\r\n");
                    out.write(strBuf.toString().getBytes());
                    DataInputStream in = new DataInputStream(
                            new FileInputStream(file));
                    int bytes = 0;
                    byte[] bufferOut = new byte[1024];
                    while ((bytes = in.read(bufferOut)) != -1) {
                        out.write(bufferOut, 0, bytes);
                    }
                    in.close();
                }
            }
            byte[] endData = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();
            out.write(endData);
            out.flush();
            out.close();
            int responseCode = conn.getResponseCode();
            if (responseCode==200) {
                // 读取返回数据
                StringBuffer strBuf = new StringBuffer();
                BufferedReader reader = new BufferedReader(new InputStreamReader(
                        conn.getInputStream()));

                String line = null;
                while ((line = reader.readLine()) != null) {
                    strBuf.append(line).append("\n");
                }
                res = strBuf.toString();
                reader.close();
                reader = null;
            }else{
                StringBuffer error = new StringBuffer();
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(
                        conn.getErrorStream()));
                String line1 = null;
                while ((line1=bufferedReader.readLine())!=null) {
                    error.append(line1).append("\n");
                }
                res=error.toString();
                bufferedReader.close();
                bufferedReader=null;
            }

        } catch (Exception e) {
            System.out.println("发送POST请求出错。" + e);
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.disconnect();
                conn = null;
            }
        }
        return res;
    }
}
